Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | 3x 3x 3x 6x 77x 77x 77x 77x 149x 6x 56x 23x 54x 51x 51x 13x 18x 9x 4x 7x 5x 5x 3x 5x 6x 56x 56x 56x 56x 5x 5x 5x 5x 9x 9x 9x 9x 9x 45x 45x 45x 45x 45x 45x 25x 25x 25x 50x 25x 13x 13x 13x 13x 13x 15x 15x 15x 13x 4x 4x 4x 4x 4x 7x 7x 7x 4x 7x | import {utf8Size} from '@jsonjoy.com/util/lib/strings/utf8';
import {sort} from '@jsonjoy.com/util/lib/sort/insertion';
import type {IWriter, IWriterGrowable} from '@jsonjoy.com/buffers/lib';
import type {BinaryJsonEncoder} from '../types';
export class BencodeEncoder implements BinaryJsonEncoder {
constructor(public readonly writer: IWriter & IWriterGrowable) {}
public encode(value: unknown): Uint8Array {
const writer = this.writer;
writer.reset();
this.writeAny(value);
return writer.flush();
}
/**
* Called when the encoder encounters a value that it does not know how to encode.
*
* @param value Some JavaScript value.
*/
public writeUnknown(value: unknown): void {
this.writeNull();
}
public writeAny(value: unknown): void {
switch (typeof value) {
case 'boolean':
return this.writeBoolean(value);
case 'number':
return this.writeNumber(value as number);
case 'string':
return this.writeStr(value);
case 'object': {
if (value === null) return this.writeNull();
const constr = value.constructor;
switch (constr) {
case Object:
return this.writeObj(value as Record<string, unknown>);
case Array:
return this.writeArr(value as unknown[]);
case Uint8Array:
return this.writeBin(value as Uint8Array);
case Map:
return this.writeMap(value as Map<unknown, unknown>);
case Set:
return this.writeSet(value as Set<unknown>);
default:
return this.writeUnknown(value);
}
}
case 'bigint': {
return this.writeBigint(value);
}
case 'undefined': {
return this.writeUndef();
}
default:
return this.writeUnknown(value);
}
}
public writeNull(): void {
this.writer.u8(110); // 'n'
}
public writeUndef(): void {
this.writer.u8(117); // 'u'
}
public writeBoolean(bool: boolean): void {
this.writer.u8(bool ? 0x74 : 0x66); // 't' or 'f'
}
public writeNumber(num: number): void {
const writer = this.writer;
writer.u8(0x69); // 'i'
writer.ascii(Math.round(num) + '');
writer.u8(0x65); // 'e'
}
public writeInteger(int: number): void {
const writer = this.writer;
writer.u8(0x69); // 'i'
writer.ascii(int + '');
writer.u8(0x65); // 'e'
}
public writeUInteger(uint: number): void {
this.writeInteger(uint);
}
public writeFloat(float: number): void {
this.writeNumber(float);
}
public writeBigint(int: bigint): void {
const writer = this.writer;
writer.u8(0x69); // 'i'
writer.ascii(int + '');
writer.u8(0x65); // 'e'
}
public writeBin(buf: Uint8Array): void {
const writer = this.writer;
const length = buf.length;
writer.ascii(length + '');
writer.u8(0x3a); // ':'
writer.buf(buf, length);
}
public writeStr(str: string): void {
const writer = this.writer;
const length = utf8Size(str);
writer.ascii(length + '');
writer.u8(0x3a); // ':'
writer.ensureCapacity(str.length * 4);
writer.utf8(str);
}
public writeAsciiStr(str: string): void {
const writer = this.writer;
writer.ascii(str.length + '');
writer.u8(0x3a); // ':'
writer.ascii(str);
}
public writeArr(arr: unknown[]): void {
const writer = this.writer;
writer.u8(0x6c); // 'l'
const length = arr.length;
for (let i = 0; i < length; i++) this.writeAny(arr[i]);
writer.u8(0x65); // 'e'
}
public writeObj(obj: Record<string, unknown>): void {
const writer = this.writer;
writer.u8(0x64); // 'd'
const keys = sort(Object.keys(obj));
const length = keys.length;
for (let i = 0; i < length; i++) {
const key = keys[i];
this.writeStr(key);
this.writeAny(obj[key]);
}
writer.u8(0x65); // 'e'
}
public writeMap(obj: Map<unknown, unknown>): void {
const writer = this.writer;
writer.u8(0x64); // 'd'
const keys = sort([...obj.keys()]);
const length = keys.length;
for (let i = 0; i < length; i++) {
const key = keys[i];
this.writeStr(key + '');
this.writeAny(obj.get(key));
}
writer.u8(0x65); // 'e'
}
public writeSet(set: Set<unknown>): void {
this.writeArr([...set.values()]);
}
}
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